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authorDimitry Andric <dim@FreeBSD.org>2015-12-30 11:46:15 +0000
committerDimitry Andric <dim@FreeBSD.org>2015-12-30 11:46:15 +0000
commitdd58ef019b700900793a1eb48b52123db01b654e (patch)
treefcfbb4df56a744f4ddc6122c50521dd3f1c5e196 /test/CodeGen/SystemZ/fp-cmp-05.ll
parent2fe5752e3a7c345cdb59e869278d36af33c13fa4 (diff)
Notes
Diffstat (limited to 'test/CodeGen/SystemZ/fp-cmp-05.ll')
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diff --git a/test/CodeGen/SystemZ/fp-cmp-05.ll b/test/CodeGen/SystemZ/fp-cmp-05.ll
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+; Test that floating-point instructions that set cc are used to
+; eliminate compares for load complement, load negative and load
+; positive.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
+; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
+
+; Load complement (sign-bit flipped).
+; Test f32
+define float @f1(float %a, float %b, float %f) {
+; CHECK-LABEL: f1:
+; CHECK: lcebr
+; CHECK-NEXT: je
+ %neg = fsub float -0.0, %f
+ %cond = fcmp oeq float %neg, 0.0
+ %res = select i1 %cond, float %a, float %b
+ ret float %res
+}
+
+; Test f64
+define double @f2(double %a, double %b, double %f) {
+; CHECK-LABEL: f2:
+; CHECK: lcdbr
+; CHECK-NEXT: je
+ %neg = fsub double -0.0, %f
+ %cond = fcmp oeq double %neg, 0.0
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Negation of floating-point absolute.
+; Test f32
+declare float @llvm.fabs.f32(float %f)
+define float @f3(float %a, float %b, float %f) {
+; CHECK-LABEL: f3:
+; CHECK: lnebr
+; CHECK-NEXT: je
+ %abs = call float @llvm.fabs.f32(float %f)
+ %neg = fsub float -0.0, %abs
+ %cond = fcmp oeq float %neg, 0.0
+ %res = select i1 %cond, float %a, float %b
+ ret float %res
+}
+
+; Test f64
+declare double @llvm.fabs.f64(double %f)
+define double @f4(double %a, double %b, double %f) {
+; CHECK-LABEL: f4:
+; CHECK: lndbr
+; CHECK-NEXT: je
+ %abs = call double @llvm.fabs.f64(double %f)
+ %neg = fsub double -0.0, %abs
+ %cond = fcmp oeq double %neg, 0.0
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Absolute floating-point value.
+; Test f32
+define float @f5(float %a, float %b, float %f) {
+; CHECK-LABEL: f5:
+; CHECK: lpebr
+; CHECK-NEXT: je
+ %abs = call float @llvm.fabs.f32(float %f)
+ %cond = fcmp oeq float %abs, 0.0
+ %res = select i1 %cond, float %a, float %b
+ ret float %res
+}
+
+; Test f64
+define double @f6(double %a, double %b, double %f) {
+; CHECK-LABEL: f6:
+; CHECK: lpdbr
+; CHECK-NEXT: je
+ %abs = call double @llvm.fabs.f64(double %f)
+ %cond = fcmp oeq double %abs, 0.0
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+